Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff439379adb4fdf…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 14:11:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0fd8a82e9c8b299ee0a7bd13e44cad1a SHA-1: 580111ec86ec1dc89a19bc426b99f4a88962a98d SHA-256: bff439379adb4fdf7a97e30b86827e454c55a0f00eb59ba35a3da9cc4b16a351
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent lure related to 'free generators' and 'game hacks' for popular games like Roblox. It directs users to a specific URL, http://netcdn.co/app/431946152/how-to-play-any-paid-roblox-game-for-free-game-hack, which is flagged as a high-risk finding. The presence of embedded URLs and the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic strongly suggest a social engineering tactic to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/how-to-play-any-paid-roblox-game-for-free-game-hack PDF link annotation
    • http://www.fluidtech.hu/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-youtube-roblox-banner-template_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/pubg-uc-nepal_GM1330123889.pdfIn PDF document text
    • http://www.fluidtech.hu/images/games-that-actually-give-you-free-robux-no-hackers_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/getting-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-stuff-on-roblox-ios_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-hack-code_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/hack-app-for-roblox-computer_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-do-i-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D75 22424 bytes
SHA-256: 2e6bbaa7428b07de8aab58f3adc6b7d6558bca7185bf65d46cc369bbddc2da05
font_01_sfnt_off00005f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F62 19516 bytes
SHA-256: cfc77dece992d0947a654689c921e9d26514f4dda57d8e89d8f4e0112e8be1a1

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